"Expedient," "politic," and "advisable" mean dictated by practical or sensible motives. "Expedient" usually implies what is immediately advantageous, without concern for ethics or consistent principles, as in "Our choice was expedient, not emotional." "Politic" stresses wisdom especially in dealing with others or in carrying out a policy, but usually implies some lack of sincerity, as in "It would not be politic to ignore them." "Advisable" suggests what is reasonable or proper under the circumstances, as in "Sometimes it's advisable to say nothing."